I have some troubles with a RHEL 4.5 host installing nrpe.
After compiling and installing nagios-plugins v. 1.4.11 and nrpe 2.11, when I execute the command:
./check_nrpe - H localhost
I got the message: Connection refused by host
nrpe is configured to work via xinetd and the netstat command shows the port in status LISTEN.
Also I have set debug=1 but no messages appeared in /var/log/messages.
I have 4 RHEL 4.5 more hosts configured and working OK with the same configuration. No iptables run in this server.